Piekło [ˈpjɛkwɔ] (German Kleinschnellwalde) is a settlement in the administrative district of Gmina Zalewo, within Iława County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) south-east of Zalewo, 24 km (15 mi) north-east of Iława, and 52 km (32 mi) west of the regional capital Olsztyn.